World Rugby said in a statement: “World Rugby is investigating an alleged breach by the England coaching team of the match-day communications protocol between match officials and team members or union officials during the Rugby World Cup 2015 Pool A match between England and Australia at Twickenham on 3 October.

"The protocol prohibits certain conduct on match days, including coaches approaching match officials during a match or at half-time during a match.”

Lancaster's future as England boss is under scrutiny following the exit from the World Cup, but RFU bosses have said that they will take their time in making a decision.

It is expected he will depart after Saturday's match with Uruguay but will be asked to stay on to work with player development.